Loader.php in Bamboo Twig 8.5

Namespace

Drupal\bamboo_twig_loader\TwigExtension

File

bamboo_twig_loader/src/TwigExtension/Loader.php

<?php

namespace Drupal\bamboo_twig_loader\TwigExtension;

use Twig\TwigFunction;
use Drupal\bamboo_twig\TwigExtension\TwigExtensionBase;

/**
 * Provides some loaders as Twig Extensions.
 */
class Loader extends TwigExtensionBase {

  /**
   * {@inheritdoc}
   */
  public function getFunctions() {
    return [
      new TwigFunction('bamboo_load_entity', [
        $this,
        'loadEntity',
      ]),
      new TwigFunction('bamboo_load_field', [
        $this,
        'loadField',
      ]),
      new TwigFunction('bamboo_load_currentuser', [
        $this,
        'loadCurrentUser',
      ]),
      new TwigFunction('bamboo_load_image', [
        $this,
        'loadImage',
      ]),
    ];
  }

  /**
   * Unique identifier for this Twig extension.
   */
  public function getName() {
    return 'bamboo_twig_loader.twig.loader';
  }

  /**
   * Returns an entity object in the current context language.
   *
   * Keep in mind languages loading priorities:
   *  1. Get the entity in the current page lang,
   *  2. When not found, try to fetch the entity in the default site lang,
   *  3. When not found in 2 previous attempts, fetch the original entity lang.
   *
   * @param string $entity_type
   *   The entity type.
   * @param mixed $id
   *   (optional) The ID of the entity to load.
   * @param string $langcode
   *   (optional) For which language the entity should be rendered, defaults to
   *   the current content language.
   *
   * @return null|Drupal\Core\Entity\EntityInterface
   *   An entity object for the entity or NULL if the entity does not exist.
   */
  public function loadEntity($entity_type, $id = NULL, $langcode = NULL) {
    $entityRepository = $this
      ->getEntityRepository();
    $entity = $id ? $this
      ->getEntityTypeManager()
      ->getStorage($entity_type)
      ->load($id) : $this
      ->getCurrentRouteMatch()
      ->getParameter($entity_type);
    if (!$entity) {
      return NULL;
    }

    // Get the entity in the current context language.
    return $entityRepository
      ->getTranslationFromContext($entity, $langcode);
  }

  /**
   * Returns the field object for a single entity field.
   *
   * @param string $field_name
   *   The field name.
   * @param string $entity_type
   *   The entity type.
   * @param mixed $id
   *   (optional) The ID of the entity to render.
   * @param string $langcode
   *   (optional) Language code to load translation.
   *
   * @return null|Drupal\Core\Field\FieldItemListInterface
   *   A field object for the entity or NULL if the value does not exist.
   */
  public function loadField($field_name, $entity_type, $id = NULL, $langcode = NULL) {

    // Load the entity view using the current content language.
    if (!$langcode) {
      $langcode = $this
        ->getLanguageManager()
        ->getCurrentLanguage()
        ->getId();
    }
    $entity = $this
      ->loadEntity($entity_type, $id, $langcode);
    if (!$entity) {
      return NULL;
    }

    // Ensure the entity has the requested field.
    if (!$entity
      ->hasField($field_name)) {
      return NULL;
    }

    // Do not continue if the field is empty.
    if ($entity
      ->get($field_name)
      ->isEmpty()) {
      return NULL;
    }
    if (isset($entity->{$field_name})) {
      return $entity->{$field_name};
    }
    return NULL;
  }

  /**
   * Return the current user object.
   *
   * @return \Drupal\user\Entity\User|null
   *   The current user object or NULL when anonymous.
   */
  public function loadCurrentUser() {
    $currentUser = $this
      ->getCurrentUser();
    if ($currentUser
      ->isAnonymous()) {
      return NULL;
    }
    return $this
      ->getUserStorage()
      ->load($currentUser
      ->id());
  }

  /**
   * Load a ImageInterface object for an original image path or URI.
   *
   * @param string $path
   *   The path or URI to the original image.
   *
   * @return \Drupal\Core\Image\ImageInterface
   *   An Image object.
   */
  public function loadImage($path) {
    return $this
      ->getImageFactory()
      ->get($path);
  }

}

Classes

Name	Description
Loader	Provides some loaders as Twig Extensions.